12/17/2011
John V. Ballun, P.E. is vice president of engineering at Val-Matic Valve & Mfg. Corp., 905 Riverside Dr., Elmhurst, IL 60126. He has more than 25 years of experience working with water system valves and valve standards.
John V. Ballun, P.E. is vice president of engineering at Val-Matic Valve & Mfg. Corp., 905 Riverside Dr., Elmhurst, IL 60126. He has more than 25 years of experience working with water system valves and valve standards.